Bite operated viewport

Details Bite operated viewport Bite operated viewport

1986-07-03

1987-11-17

Nerbun, Peter

Apparel

Guard or protector

For wearer's head

A61F 906

Patent

active

047063017

ABSTRACT:
A viewport for a welder's protective mask or the like, with a semitransparent window arranged to be opened by mandibular action of the user for inspection of a newly set weld, for example, while leaving both hands free to hold or manipulate other equipment.

REFERENCES:
patent: 1885744 (1932-11-01), Malcom
patent: 2644161 (1953-07-01), Meyer
patent: 4539713 (1985-09-01), Hodge

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